113 lines
No EOL
3.7 KiB
YAML
113 lines
No EOL
3.7 KiB
YAML
id: https://nde.nl/ontology/hc/class/Timestamp
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name: timestamp_class
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title: Timestamp Class
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prefixes:
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linkml: https://w3id.org/linkml/
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hc: https://nde.nl/ontology/hc/
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time: http://www.w3.org/2006/time#
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xsd: http://www.w3.org/2001/XMLSchema#
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crm: http://www.cidoc-crm.org/cidoc-crm/
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schema: http://schema.org/
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default_prefix: hc
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imports:
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- linkml:types
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- ../metadata
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- ../slots/comply_with
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- ../slots/has_level # was: timestamp_precision
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- ../slots/has_score # was: template_specificity
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- ../slots/has_timestamp # was: timestamp_value
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classes:
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Timestamp:
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class_uri: time:Instant
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description: |
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A point in time with optional precision and calendar metadata.
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**Purpose**:
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Timestamp provides a reusable class for representing temporal instants
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with explicit precision indicators. This supports EDTF-style partial
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dates (year-only, year-month, full date, datetime) and calendar system
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annotation for non-Gregorian dates.
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**Ontological Alignment**:
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- **Primary**: `time:Instant` - OWL Time instant
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- **Close**: `crm:E61_Time_Primitive` - CIDOC-CRM time primitive
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- **Related**: `xsd:dateTime` - XML Schema dateTime
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**Use Cases**:
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- Beginning/ending of time spans (TimeSpan.begin_of_the_begin, etc.)
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- Validity dates (valid_from, valid_to)
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- Update timestamps (updated_at, created_at)
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- Historical dates with varying precision
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**Precision Levels**:
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- year: "1995" (EDTF: "1995")
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- month: "1995-06" (EDTF: "1995-06")
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- day: "1995-06-15" (EDTF: "1995-06-15")
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- datetime: "1995-06-15T10:30:00" (full precision)
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**Replaces** (per slot_fixes.yaml):
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- `valid_to_geo` → TimeSpan.end_of_the_end: Timestamp
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- `valid_to` → TimeSpan.end_of_the_end: Timestamp
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- `valid_from_geo` → TimeSpan.begin_of_the_begin: Timestamp
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- `valid_from` → TimeSpan.begin_of_the_begin: Timestamp
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- `updated_at` → last_updated_at: TimeSpan
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- `unesco_inscription_year` → TimeSpan.begin_of_the_begin: Timestamp
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exact_mappings:
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- time:Instant
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close_mappings:
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- crm:E61_Time_Primitive
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related_mappings:
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- xsd:dateTime
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- schema:DateTime
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slots:
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- has_timestamp # was: timestamp_value - migrated per Rule 53
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- has_level # was: timestamp_precision - migrated per Rule 53
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- comply_with # was: calendar_system - migrated 2026-01-22
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- has_score # was: template_specificity - migrated per Rule 53 (2026-01-17)
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slot_usage:
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has_timestamp: # was: timestamp_value - migrated per Rule 53
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# range: string
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required: true
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pattern: "^-?\\d{4}(-\\d{2})?(-\\d{2})?(T\\d{2}:\\d{2}(:\\d{2})?(\\.\\d+)?(Z|[+-]\\d{2}:\\d{2})?)?$"
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has_level: # was: timestamp_precision - migrated per Rule 53
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# range: string
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required: false
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examples:
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- value: year
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- value: day
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- value: second
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comply_with:
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range: CalendarSystem
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required: false
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inlined: true
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inlined_as_list: true
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examples:
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- value:
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- value:
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annotations:
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custodian_types: '["*"]'
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custodian_types_rationale: Generic timestamp class applicable to all types.
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custodian_types_primary: null
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specificity_score: 0.15
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specificity_rationale: Very broadly applicable generic class for temporal points.
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examples:
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- value: |
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has_timestamp: "1995"
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has_level: year
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- value: |
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has_timestamp: "2024-06-15"
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has_level: day
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comply_with:
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- value: |
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has_timestamp: "2024-06-15T14:30:00Z"
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has_level: second
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comply_with: |